Question

Specify the largest value of the function y=1-cos3x
1) 1 2) 2 3) 0

Answer 1

Since, cos 3x belongs to [-1, 1]

So,    - cos 3x belongs to [-1, 1]

So,  1 - cos 3x belongs to [1 - 1, 1 + 1]

So,  1 - cos 3x belongs to [0, 2]

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